I always worried about losing my paper tickets. Given their significant value and complex routings, I was afraid they would be hard to replace. Thus, I went a bit overboard in copying them, as at least that gave me ticket numbers and routing. I left a copy at home or with a friend I could reach, put one in my suitcase, and one in my husband's suitcase. I also meticulously put the paper ticket in the hotel safe each and every night.